validate method

@override bool validate(dynamic value, [ List<String>? options ])

Validates whether the provided value is an integer.

The value parameter is the value to be validated. It can be of any type. The optional options parameter is not used in this validation rule.

Returns true if the value is a non-null integer, otherwise returns false.

Implementation

@override
bool validate(dynamic value, [List<String>? options]) {
  if (value == null) return false; // Return false if the value is null.
  return RegExp(r'^\d+$').hasMatch(
    value.toString(),
  ); // Check if the value matches the integer pattern.
}